Fluid ounces (US) to cups (metric) conversion calculator shown above calculates how many cups (metric) are in 'X' fluid ounces (US) (where 'X' is the number of fluid ounces (US) to convert to cups (metric)). In order to convert a value from fluid ounces (US) to cups (metric) just type the number of fl oz to be converted to cups (metric) and then click on the 'convert' button.